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TI-2026-62622 Aliases CVE-2026-92959GHSA-9538-79j2-h62hGHSA-f8gf-w286-fmq2

vm2 before 3.11.8 allowAsync Bypass via Promise Thenable

Priority MEDIUM 64CWE-693Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
None · Low · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-693.

Summary

vm2 before 3.11.8 does not fully enforce the allowAsync: false option in VM and NodeVM. While localPromise.prototype.then is replaced with a handler that throws 'Async not available', the sandbox's Promise static methods (Promise.resolve, Promise.all, Promise.race, Promise.any, and Promise.allSettled) still assimilate attacker-supplied thenables: native promise resolution performs PromiseResolveThenableJob and invokes the sandboxed code's then method in a microtask without passing through the patched then, so the async restriction is never applied. As a result, sandboxed script can schedule work that runs after VM.run() or NodeVM.run() has returned and outside the configured timeout, continuing to execute after the host believes execution is complete.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00449 39th percentileScored 2026-11-07
Fix Fixed vm2 (patriksimek): 3.11.8vm2 (npm): 3.11.8Red Hat: 6 advisories

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
patriksimekvm2before 3.11.83.11.8Patch availableCNA
—vm2 (npm)before 3.11.83.11.8Patch availableGHSA-f8gf-w286-fmq2
  • vm2 Vendorpatriksimek Affected before 3.11.8 Fixed in 3.11.8 Patch available CNA
  • vm2 (npm) Vendor— Affected before 3.11.8 Fixed in 3.11.8 Patch available GHSA-f8gf-w286-fmq2

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:vm2_project:vm2:*:*:*:*:*:*:*:*——patriksimek
  • cpe:2.3:a:vm2_project:vm2:*:*:*:*:*:*:*:* Versions — — ·patriksimek

Remediation

  • Fix · CNA vm2 (patriksimek) Fixed in 3.11.8
  • Fix · GHSA-f8gf-w286-fmq2 vm2 (npm) Fixed in 3.11.8 Advisory →

Red Hat 6 advisories

  • RHSA-2026:91651 Released 2026-10-28 · Red Hat rating Critical
    Red Hat Developer Hub 1.9.10 release.
    • Red Hat Developer Hub 1.9 registry.redhat.io/rhdh/rhdh-hub-rhel9, registry.redhat.io/rhdh/rhdh-rhel9-operator
  • RHSA-2026:82151 Released 2026-10-13 · Red Hat rating Critical
    Ansible automation portal Red Hat Enterprise Linux Images
    • Red Hat Ansible Automation Platform 2.2 registry.redhat.io/ansible-automation-platform/bootc-automation-portal-rhel9
  • RHSA-2026:79088 Released 2026-10-08 · Red Hat rating Critical
    Red Hat Developer Hub 1.10.5 release.
    • Red Hat Developer Hub 1.10 registry.redhat.io/rhdh/rhdh-hub-rhel9, registry.redhat.io/rhdh/rhdh-rhel9-operator
Show 3 more Red Hat advisories
  • RHSA-2026:76788 Released 2026-10-06 · Red Hat rating Critical
    Red Hat Developer Hub 1.10.5 Plugin Catalog GA plugins release.
    • Red Hat Developer Hub 1.10 registry.redhat.io/rhdh/red-hat-developer-hub-backstage-plugin-lightspeed, registry.redhat.io/rhdh/red-hat-developer-hub-backstage-plugin-lightspeed-backend, registry.redhat.io/rhdh/red-hat-developer-hub-backstage-plugin-orchestrator +4
  • RHSA-2026:72722 Released 2026-09-28 · Red Hat rating Important
    Ansible plug-ins for Red Hat Developer Hub Product Release Update
    • Red Hat Ansible Automation Platform 2.2 registry.redhat.io/ansible-automation-platform/automation-portal
  • RHSA-2026:72712 Released 2026-09-28 · Red Hat rating Important
    Ansible plug-ins for Red Hat Developer Hub Product Release Update
    • Red Hat Ansible Automation Platform 2.1 registry.redhat.io/ansible-automation-platform/automation-portal

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    patriksimek vm2 3.11.8

    6 records Highest priority Priority HIGH 5 HIGH, 1 MEDIUM

    Other records, highest priority first

    • TI-2026-62618 vm2 before 3.11.8 Sandbox Escape via NodeVMPriority HIGH 82
    • TI-2026-62617 vm2 3.10.0 through 3.11.7 Denial of Service via Host PromisePriority HIGH 79
    • TI-2026-62616 vm2 3.11.0 through 3.11.7 Prototype Pollution via TypedArrayPriority HIGH 79
    Show all 6 records →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Ansible Automation Platform 2.1Fixed RHSA-2026:72712
Red Hat Ansible Automation Platform 2.2Fixed RHSA-2026:72722, RHSA-2026:82151
Red Hat Developer Hub 1.10Fixed RHSA-2026:76788, RHSA-2026:79088
Red Hat Developer Hub 1.9Fixed RHSA-2026:91651
Not affected: 2 products
  • Red Hat Developer Hub 1.10
  • Red Hat Developer Hub 1.9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-92959
  2. 2026-10-03 Alias added: GHSA-9538-79j2-h62h
  3. 2026-10-06 Alias added: GHSA-f8gf-w286-fmq2
  4. 2026-10-06 Fix available: npm/[email protected] · GHSA-f8gf-w286-fmq2
  5. 2026-10-06 CVSS score added · GHSA-f8gf-w286-fmq2
  6. 2026-10-06 Weakness changed · GHSA-f8gf-w286-fmq2
  7. 2026-10-06 5 new references · GHSA-f8gf-w286-fmq2
  8. 2026-10-07 Fix available: RHSA-2026:76788 · Red Hat
  9. 2026-10-07 Fix available: Red Hat Developer Hub 1.10 · Red Hat
  10. 2026-10-09 Fix available: RHSA-2026:79088 · Red Hat
  11. 2026-10-09 Affected versions changed · Red Hat
  12. 2026-10-13 Affected versions changed · Red Hat
  13. 2026-10-13 Fix available: RHSA-2026:82151 · Red Hat
  14. 2026-10-30 Fix available: RHSA-2026:91651 · Red Hat
  15. 2026-10-30 Fix available: Red Hat Developer Hub 1.9 · Red Hat

References

Advisory 2

Other 3

  • TI-2023-14382 Sandbox Escape in vm2 CVSS 3.1CRITICAL 10.0
  • TI-2023-13478 vm2 Sandbox Escape vulnerability CVSS 3.1CRITICAL 10.0
  • TI-2026-63070 vm2 before 3.12.1 Sandbox Escape via Promise Symbol.species CVSS 4.0CRITICAL 10.0
  • TI-2026-63067 vm2 before 3.12.1 Sandbox Escape RCE via Non-Strict Host Function CVSS 4.0CRITICAL 10.0
  • TI-2026-62623 vm2 before 3.11.6 Process-wide State Exposure via os and dns CVSS 4.0CRITICAL 10.0
  • TI-2026-62618 vm2 before 3.11.8 Sandbox Escape via NodeVM CVSS 4.0CRITICAL 10.0
See all 80 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences